Nose-piece for microscopes.



H. N. OTT & K..LBUGHSENRING.

NOSE PIECE FOR MIGROSOOPES. APPLICATION rum) JAN. 2, 1912.

1,023,390. Patented Apr. 16, 1912.

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UNITED STATES PATENT OFFICE.

HARVEY N. O'IT AND KONR-AD LEUCHSENRING, OF BUFFALO, NEW YORK, ASSIGNORSTO SPENCER LENS COMPANY, OF BUFFALO, NEW YORK.

NOSE-PIECE FOR MICROSCOPES.

Application filed January 2, 1912.

To (all whom it may concern:

Be it known that we, HARVEY N. Owl and KoNnAD LEUOHSENRING, citizens ofthe United States, residing at Buffalo, in the county of Erie and Stateof New York, have invented a new and useful Improvement in Nose-Piecesfor Microscopes, of which the following is a specification.

This invention relates to nose pieces for microscopes of that kind inwhich a plurality of different objectives are supported by a rotatablecarrier so that any one of the objectives can be placed in position foruse by turning the objective carrier. These nose pieces are providedwith stops or devices which act to resist the movement of the objectivecarrier when any one of the objectives has been brought into the opticalaxis and to releasably hold the nose piece in this position. The devicesheretofore used for this purpose must be made and fitted with great carein order to insure the requisite accuracy of position of the objectives,and much time and labor are required in assembling and adjusting theparts.

The objects of this invention are to provide stop devices for nosepieces which insure absolute accuracy of position of the obj ectives butnevertheless reduce the time and labor required in assembling andadjusting th parts of the nose piece; also to provide stop devices whichcan be quickly and easily adjusted as required to insure the correctpositions of the several objectives; and also to produce stop deviceswhich are of exceedingly simple and inexpensive construction and do notdetract from the neat appearance of the nose piece.

In the accompanying drawing: Figure 1 is a side elevation of amicroscope equipped with a nose piece embodying the invention. Fig. 2 isan inverted sectional plan, on an enlarged scale, of the nose piecedetached. Fig. 3 is a similar view thereof, showing a different positionof the objective carrier. Fig. 4 is a sectional elevation thereof inline 44, Fig. 2. Fig. 5 is a bottom plan view thereof.

Like reference characters refer to like parts in the several figures.

A represents a microscope stand of ordinary construction, B the lenstube thereof, and C a nose piece provided with a plurality of objectivesD. A triple nose piece having three objectives is illustrated in thedraw- Specification of Letters Patent.

Patented Apr. 16, 1912.

Serial No. 668,929.

ings, but the invention is in no wise restricted to this number ofobjectives and the nose piece can have any desired number of objectives.

The nose piece, except with respect to the stop or holding devices forpositioning and releasably retaining the objectives in position for use,may be of any suitable construction. It consists, as usual, of a memberc which is removably secured on the end of the lens tube B, and a member0' which carries the objectives D and is mounted on the member 0 so thatit can be turned thereon about a central axis for placing one or anotherof the objectives in line with the lens tube. In the nose piece shown inthe drawings the supporting member 0 consists of a concave disk having ascrewthreaded nipple C by which it is screwed on the end of the lenstube, and the rotatable member 0 consists of a concave disk which isarranged to turn on a central stud 0 projecting from the supportingmember and is provided with an edge flange or rim 0 bearing against theunder side of the edge portion of the supporting disk and with threadednipples or bosses a for the attachment of the objectives.

E represents a detent or catch which is secured to the member 0 of thenose piece and is adapted to spring into notches or 'grooves f in aplurality of stop screws F which are adjustably secured in the rotatablemember 0 of the nose piece. The

, number of the stop screws F employed depends upon the number ofobjectives carried by the nose piece, there being one screw for eachobjective. The catch or detent preferably consists, as shown, of a pieceof spring metal located in the cavity of the nose piece and secured atone end to the member 0 by screws, or otherwise, with its free endprojecting toward the rim of the screws are smooth except for the groovef. The screws are adapted to be turned by a screw driver inserted intothe outer ends of the screw holes f. Preferably the stop screwsterminate within the screw holes so that there will not be anyprojections on th e outer edge of the nose piece.

When the objective carrier is turned to place any desired objective inposition for use, the free end of the detent E will 'engage and slide onthe'stop screw F for that objective until it snaps into the groove 7 andresists further movement of the carrier. The objective will then be incorrect position and will be retained in this position until theobjective carrier is forcibly turned to place another objective inposition for use. The positions of the grooves f can be changed as maybe necessary to insure absolute accuracy of position of the objectivesby simply turning the stop screws by means of a small screw driverinserted in the outer ends of the screw holes f. This can be donequickly and easily when adjusting the instrument at the factory, andafter the stop screws are once properly adjusted they require no furtheradjustment.

We claim as our invention:

1. In a nose piece for microscopes, the combination with a rotatablemember carrying objectives, and a member which supports said rotatablemember, ofstop screws adjustably secured on one of said members, and acatch carried by said other member and adapted to engage said stopscrews for holding the objectives in position for use, substantially asset forth.

2. In a nose piece for microscopes, the combination with a rotatablemember carrying objectives, and a member which sup ports said rotatablemember, of a catch carried by one of said members, and stop deviceswhich are arranged on said other screws which are arranged on said othermember substantially perpendicular to radial lines extending from thestop screws to the axis of said rotatable member and havecircumferential grooves in which said catch is adapted to engage forholding said rotatable member from turning, the relative 7 position ofsaid grooves being adapted to be changed by turning said stop screws,substantially as set forth.

4:. In a nose' piece for microscopes, the combination with a rotatablemember carrying objectives and having a circular rim, and a member whichsupports said rotatable member, of a catch secured to said supportingmember, and stop screws arranged in said rotatable member in therelation of chords to said circular rim, saidstop screws having groovesfor the engagement of said catch and being adapted to be turned forchanging the relative position of said grooves, substantially as setforth.

Witness our hands this 5th day of De cember, 1911. v

' HARVEY N. OTT. KONRAD LEUGHSENRING. Witnesses:

CoRA FAoKLAIN, LOUIS M. POTTER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

